Geordi: Choose your firefox version for cuc

Geordi 0.16+ Show archive.org snapshot supports running selenium tests with project-specific firefox versions.

Just update the gem. It will still default to using the old 5.0.1 firefox. If you want another one, add a file .firefox-version to your project, containing your preferred version.

geordi cucumber will prompt (and guide) you to install the given version. You can delete any old installation sitting in /opt/firefox-for-selenium if you have one.